Exceeding the lawful speed limit is neither recommended nor endorsed. Inflation pressure increase must not exceed the maximum pressure branded on the tire sidewall. Load Capacity (% of max) 100 100 100 100 100 100 100 100 100 95 90 85įor speeds above 186 mph (300 kph), consult your vehicle manufacturer and tire dealer. Shop g-Force COMP-2 A/S PLUS tires for our best ultra-high performance all-season tire. Maximum Speed (mph) 118 124 130 136 143 149 155 161 168 Experience advanced wet and dry handling for ultimate control. In the absence of specific recommendations by the vehicle manufacturer, use the following guidelines based on those in the European Tyre and Rim Technical Organization Standards Manual.įor speeds over 160km/h (100 mph), load and inflation must be adjusted according to the tables below. Exceeding the lawful speed limit is neither recommended nor endorsed.įor high-speed driving, additional inflation pressure and possibly reduced tire loading and/or upsizing is required. When a customer requests a replacement tire with a lower speed rating than the original equipment tire, you must clearly communicate to him or her that the handling of the vehicle may be different, and that its maximum speed capability is limited to that of the lowest speed-rated tire on the vehicle. Before mixing types of tires in any configuration on any vehicle, be sure to check the vehicle owner's manual for its recommendations.ĭANGER: Never mount a 16" diameter tire on a 16.5" rim.ĭANGER: Never mount a 17" diameter tire on a 17.5" rim. Only tire professionals should mount tires and they should never inflate beyond 40 psi to seat the beads. Serious injury or death may result from explosion of tire/rim assembly due to improper mounting. To ensure correct air pressure and vehicle load, refer to vehicle owner's manual or tire information placard on the vehicle. WARNING: Serious or fatal injury may result from tire failure due to underinflation or overloading. Tires for a particular dimension of a given tireline may vary in appearance from the tire shown in the photograph. > Tread patterns are often tuned to accomodate different tire widths. > Section width varies approximately 0.2" (5mm) for every 0.5" change in rim width. Some tires may vary from this value by +/-3% of the section height (affecting overall diameter), and +/-4% of the section width. The sizes shown are average design values for tires measured on specified measuring rim widths. (3) Based on internal autocross dry, subjective wet and snow handling results using a 2015 BMW 328i versus the BFGOODRICH ® g-Force™ COMP-2™ A/S tire in size 245/40ZR18 XL 97Y. (2) Based on internal autocross and subjective wet handling results using a 2015 BMW 328i versus the BFGOODRICH ® g-Force™ COMP-2™ A/S tire in size 245/40ZR18 XL 97Y. The speeds shown are test speeds they are not recommended speeds.(1) Based on internal autocross dry and subjective wet handling results using a 2015 BMW 328i versus the BFGOODRICH ® g-Force™ COMP-2™ A/S tire in size 245/40ZR18 XL 97Y. However, if you are looking for better handling, there is generally no problem in moving up to a higher speed-rated tire. We don’t recommend downgrading the speed rating of your tires, as the vehicle manufacturer has done extensive testing to determine which tires match the various driving characteristics of the vehicle. Never mix tires with different speed ratings, as this may cause serious handling problems. above 186 mph, a Z rating must appear in the size designation, including a Y speed symbol in brackets. The tire may be able to reach higher speeds, but traveling at speeds higher than 99 mph for any length of time would be unsafe - the tire is not designed to handle it.įor tires having a maximum speed capability above 149 mph, a Z rating may appear in the size designation. Tires with a Q speed rating can safely sustain speeds of up to 99 miles per hour. On the sidewall of every tire, you’ll find one of these speed rating codes: Manufacturers assign speed ratings to tires after extensive performance testing. Speed rating standards are established by the U.S. A higher speed rating will generally indicate that you will have better control and handling characteristics. BFGoodrich G-Force Comp-2 A/S Plus All-Season Radial Car Tire for Ultra-High Performance, 305/35ZR20 104Y Ships from. The speed rating is a measure of what speed the tire can safely maintain for sustained periods of time.
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